预分散速溶胍胶PGW的研制及应用

doi:10.13809/j.cnki.cn32-1825/te.2021.03.020

Abstract

Abstract:

In order to save the fracturing time and cost, and realize consecutive fracturing, a kind of predispersed instant guar gum（PGW）, which can be used for successive fracturing, has been developed by the optimization of dispersion system, surfactant and other materials. The comprehensive properties have been evaluated by the experiment of concentration ratio, dissolved time, crosslinking performance, gel breaking performance, heat and shear resistance, etc. The experiment results indicate that the concentration ratio of guanidine gum powder can be more than 50 %, there is no obvious stratification in 30 days, the viscosity can meet the requirements of the system after hydration for 5 minutes and the product has good performance of cross-linking, heat resistance and shear resistance. The fracturing tests of twelve horizontal shale gas wells have been successfully carried out in south Pingqiao block of Fuling Shale Gas Field. The product performance can meet the requirements of field fracturing and realize the successive fracturing, and the price of fracturing fluid has been reduced by 32.7 %, and the purpose of cost reduction and efficiency increase has been realized.

Key words: Key Words: predispersed, instant guar gum, development, continuous fracturing, application

CLC Number:

TE357

GAO Yongmei,WANG Weiheng,XIA Weiwei,LIU Hao,ZHANG Bin. Development and application of predispersed instant guar gum[J].Petroleum Reservoir Evaluation and Development, 2021, 11(3): 437-442.

Figures/Tables 11

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References 20

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表面活性剂配方	HLB值	上层液体析出率（%）
表面活性剂配方	HLB值	1 d	7 d	30 d
Twen-80	15.000	1	3	7
Span-80	4.500	12	30	40
Span-80+Twen-80（1∶1）	9.750	10	26	35
Span-80+Twen-80（1∶2）	11.500	8	20	32
Span-80+Twen-80（1∶3）	12.375	5	12	20

序号	加料顺序	现象
1	白油→异构烷烃→ Twen-80→胍胶干粉	分散体系混合均匀,加入45 %胍胶干粉之前黏度变化不明显,继续添加至50 %左右黏度缓慢增加,可操控性较强
2	白油→Twen-80→ 异构烷烃→胍胶干粉	白油与Twen-80形成油状混合物,再加入异构烷烃后体系混合均匀但有油珠悬浮,胍胶干粉加量到30 %左右黏度剧增,迅速板结,无法继续添加
3	白油→异构烷烃→ 胍胶干粉→Twen-80	分散体系混合均匀,胍胶干粉加量到30 %左右黏度剧增,有明显的团聚物但未板结,无法继续添加
4	异构烷烃→Twen-80→ 白油→胍胶干粉	异构烷烃与Twen-80混合均匀,再加入白油后体系出现细小油珠悬浮物,静置一段时间油珠团聚变大,胍胶干粉加量到30 %左右黏度剧增,迅速板结,无法继续添加

体系配方	破胶温度（℃）	破胶时间（h）	破胶残液黏度（mPa·s）	残渣含量（mg/L）
0.6 %PGW+0.3 %JL-1 +0.02 %PJ-1	80	6	6	240
0.6 %PGW+0.3 %JL-1 +0.02 %PJ-1	80	12	3	360
0.3 %胍胶干粉+0.3 %JL-1+0.02 %PJ-1	80	6	18	190
0.3 %胍胶干粉+0.3 %JL-1+0.02 %PJ-1	80	12	6	210

胶液体系	当量价格（元/m³）	平均压裂周期（段/d）
传统胍胶干粉压裂液	220	2
速溶胍胶PGW压裂液	148	3~4

Development and application of predispersed instant guar gum

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分散体系配方	黏度（mPa·s）	浓缩比（%）	上层液体析出率（%）
分散体系配方	黏度（mPa·s）	浓缩比（%）	1 d	7 d	30 d
正丁醇	3	15	15	40
辛醇	9	17	15	40
丙三醇	54	35	15	40
异丙醇	3	55	15	40
10#白油	12	50	3	9	20
26#白油	27	40	1	1	3
异构烷烃	3	60	4	12	25
10#白油+异构烷烃（1∶1）	9	55	3	8	15
26#白油+异构烷烃（1∶1）	18	50	1	2	5

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